feat(terminal): add two-row floating keyboard buttons for common commands (mobile only) (#13876)

* feat(terminal): add two-row floating keyboard buttons for common commands (mobile only)

* Fix missing newline at end of pl.rs

Add missing newline at the end of the file.

flutter/lib/models/terminal_model.dart

@@ -146,6 +146,10 @@ class TerminalModel with ChangeNotifier {
     }
   }
 
+  Future<void> sendVirtualKey(String data) async {
+    return _handleInput(data);
+  }
+
   Future<void> closeTerminal() async {
     if (_terminalOpened) {
       try {